kubespray/inventory/sample/group_vars/k8s-cluster/k8s-net-canal.yml

# see roles/network_plugin/canal/defaults/main.yml

# The interface used by canal for host <-> host communication.
# If left blank, then the interface is choosing using the node's
# default route.
# canal_iface: ""

# Whether or not to masquerade traffic to destinations not within
# the pod network.
# canal_masquerade: "true"